Spark-arrester.



W. CRAWFORD. SPARK AEEESTER. APPLICATION FILED MAR. s, 1911.

Patented Nov. 19, 1912.

COLUMBIA PLANDGRAPH 60., WASHINGTON. n. c.

WILLIAM CRAWFORD, OF ERINVIEW, MANITOBA, CANADA.

SPARK-ARRESTER.

earner.

Specification of Letters Patent.

Application filed March 8, 1911.

Patented N ov. 19, 1912.

Serial No. 613,062.

To all whom it may concern:

Be it known that I, l/VILLIAM CR.-\\\ '.l*0ltl), of the village of Erinview, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Spark- Arresters, of which the following is the specification.

My invention relates to improvements in spark arrcsters particularly adapted for 10- comotives and traction engines, andthe object of the invention is to provide a device which will arrest the sparks passed from the engine, the device being arranged so that it can be adjusted to suit the draft without affecting its efliciency.

It consists essentially in the novel arrangement and operation of parts heremafter more particularly described and later pointed out in the appended claim.

Figure 1 is a side elevation of the spark arrester applied on a boiler. F ig. 2 is a vertical sectional view centrally through the same. Fig. 3 is an enlarged detailed vertical sectional view through the bar connecting the dampers, showing the manner in which it is adjustably secured to the smoke stack.

In the drawings like characters of reference indicate corresponding parts in each figure. I

1 represents the front of the boiler of an engine to which is attached the smoke stack A. The stack comprises the parts now described.

2 represents a base piece in the form of a casting having a flanged end 3 attached by suit-able rivets to the boiler and an upper outwardly flaring body portion 4 which receives a lower or bottom cylinder 5, the cylinder being riveted or otherwise fastened to the casting. A ledge 6 is cast with the member 2 which ledge receives and supports the cylinder.

7 is a top or upper cylinder sleeved into the lower cylinder and carrying alternately arranged stationary deflector plates 8 which are inclined downwardly.

9 are dampers carried by damper rods 10 which extend diametrically across the cylinder and have their ends journaled in the sides of the cylinders. The dampers are arranged so that they can be turned to be continuous with the deflecting plates and have each an edge turned backwardly or hooked at 11, the hooked edges appearing in what might be termed, the closed position of the dampers, one directly below the other. The damper rods are supplied with crank ends 12 which are all connected to a common adjustable bar 13 by means of pins 14 passing through slots 15 arranged in the cranked ends of the damper rods.

16 is a yoke-shaped bar permanently secured to the side of the cylinder 7 and supplied with a number of openings 17 adapted to receive a bolt 18 carried by the bar 13. By releasing the bolt 18 one can adjust the bar on the plate and cause the dampento take any desired position so as to allow of whatever draft is required within the ylinders.

19 is a small cylinder permam-zntly fas tened to the casting 2 and continuous with the opening 2 therein. A head 20 is suspended over the open top of the cylinder 11:) by means of supports 21.

The products of combustion passed from the combustion chamber of the boiler enter the cylinder 19 through the opening 2 and escape from the top of the cylinder 5 around the hood and past the dampers 9. The sparks are arrested primarily by the hood 20 and afterward by the deflector plates and the dampers.

I have found that with a spark arrester such as mine that no sparks escape and that they are completely pulverized, the dust resulting being afterward cleared out through the top of the cylinder 7 by the force of the draft so that it is unnecessary to provide any means for withdrawing accumulations within the casting 2.

lVhat I claim as my invention is:

A spark arrester comprising a base piece provided with a neck and an outwardly flaring body portion, an inner cylinder secured to the neck, a lower outer cylinder secured to the outwardly flared body portion, a hood carried by the inner cylinder and located above the upper end of the same, an upper cylinder carried by the lower cylinder, angularly disposed deflector plates secured within the upper cylinder and arranged alternately at the sides of the same throughout its length, dampers within the upper cylinder pivoted upon damper rods, said rods extending diametrically across the cylinder and having their ends journaled in the sides of the cylinder, said dampers bethe several dampers, substantially as deing normally continuous Withthe deflector scribed. 10 plates, and having lower edges hooked, a Signed at Winnipeg in the Province of bar connected to the cranked ends of the Manitoba this 19th day of December, 1910.

damper rods and adjustably secured to a WILLIAM CRAWFORD. yoke-shaped bar mounted on the outer sur- In the presence 0fface of said upper cylinder, so as to control J. S. ROXBURGH,

simultaneously the angle of inclination of J. K. ELKIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. G. 

